Method and apparatus for configuring or aquiring transmission bandwidth configuration corresponding to channel bandwidth

ABSTRACT

Provided is a transmission bandwidth configuration method. The method includes: configuring a first channel bandwidth (CB) of a carrier; and in response to determining that the first CB is greater than a first preset bandwidth, configuring subcarriers in a first TBC according to a preset percentage X of the first TBC in the first CB and the first CB, so as to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90% and the preset upper limit value is less than 100%. Also provided is a transmitting node.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. Non-Provisional application Ser. No. 17/169,170, filed on Feb. 5, 2021, which is a continuation of U.S. Non-Provisional application Ser. No. 16/399,240, filed on Apr. 30, 2019, which claims the benefit of priority under 35 U.S.C. § 120 as a continuation of PCT Patent Application No. PCT/CN2017/106918 filed on Oct. 19, 2017, which claims priority to Chinese patent application No. 201610963740.4 filed on Nov. 4, 2016, the disclosure of each of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to transmission technologies in the field of wireless communications and, in particular, to a transmission bandwidth configuration method and a transmitting node.

BACKGROUND

The long term evolution (LTE) technology is a wireless cellular communication technology of the 4th generation mobile communication technology (4G). The LTE uses an orthogonal frequency division multiplexing (OFDM) technology. Wireless physical time-frequency resources of the LTE system are composed of time-frequency resources which are constituted by subcarriers and OFDM symbols. At present, the LTE supports channel bandwidths of six carriers, i.e., 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz and 20 MHz. In a multi-carrier system, the channel bandwidth of the carrier is usually composed of transmission bandwidth configuration (TBC) and a guard band (GB). A maximum proportion of an uplink TBC in a channel bandwidth (CB) of the carrier is 90%, and the remaining 10% is the bandwidth occupied by the GB. However, a downlink TBC may have to additionally consider a size of a direct current subcarrier, the maximum proportion of the TBC thereof is 90.9%, and the remaining 9.1% is the bandwidth occupied by the GB.

SUMMARY

A summary of a subject matter is described hereinafter in detail. This summary is not intended to limit the scope of the appending claims.

Embodiments of the present disclosure provide a transmission bandwidth configuration method and a transmitting node.

Solutions of the embodiments of the present disclosure are implemented as described below.

The embodiments of the present disclosure provide a transmission bandwidth configuration method, applied to a transmitting node, which includes: configuring a first channel bandwidth (CB) of a carrier; and in response to determining that the first CB is greater than a first preset bandwidth, configuring subcarriers in a first transmission bandwidth configuration (TBC) according to a preset percentage X of the first TBC in the first CB and the first CB, to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90% and the preset upper limit value is less than 100%.

The embodiments of the present disclosure provide a transmission node, which includes: a configuration device. The configuration device is configured to configure a first CB of a carrier in a multi-carrier transmission system, and in response to determining that the first CB is greater than a first preset bandwidth, configure subcarriers in a first TBC according to a preset percentage X of the first TBC in the first CB and the first CB, so as to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90%, and the preset upper limit value is less than 100%.

The embodiments of the present disclosure further provide a transmitting node, which includes: a processor and a storage medium storing processor-executable instructions which, when executed by the processor, execute the following operations.

The processor is configured to configure a first CB of a carrier, and in response to determining that the first CB is greater than a first preset bandwidth, configure subcarriers in a first TBC according to a preset percentage X of the first TBC in the first CB and the first CB, so as to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90%, and the preset upper limit value is less than 100%.

The embodiments of the present disclosure provide a transmission bandwidth configuration method, applied to a transmitting node, which includes: configuring a plurality of channel bandwidths (CB) of carriers; configuring a transmission bandwidth configuration (TBC) corresponding to each channel bandwidth (CB), a percentage X of the TBC in the corresponding CB satisfies: as the CB increases, the percentage X of the TBC in the CB monotonically increases.

Moreover, an embodiment of the present disclosure provides a computer-readable storage medium configured to store computer-executable instructions which, when executed by a processor, implement any one of the above-mentioned methods.

A larger bandwidth occupied by the guard band will cause spectrum resource waste. The embodiments of the present disclosure provide a transmission bandwidth configuration method and a transmitting node. The method includes: configuring a first CB of a carrier; and in response to determining that the first CB is greater than a first preset bandwidth, configuring, subcarriers in a first TBC according to a preset percentage X of the first TBC in the first CB and the first CB, so as to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90% and the preset upper limit value is less than 100%. With the solutions described above, in the transmission bandwidth configuration method provided by the embodiments of the present disclosure, the transmitting node reduces the bandwidth of the guard band by increasing the bandwidth of the transmission bandwidth configuration. In this way, under the premise of satisfying the out-of-band requirements, not only more data can be transmitted in the limited channel bandwidth to increase a system peak transmission rate, but also spectrum utilization can be improved.

Other aspects can be understood after the drawings and detailed description are read and understood.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is flowchart one of a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a frequency spectrum of an example first CB in a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 3 is flowchart two of a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 4 is flowchart three of a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 5 is flowchart four of a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 6 is schematic diagram one of a frequency spectrum of an example first TBC in a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 7 is schematic diagram two of a frequency spectrum of an example first TBC in a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 8 is schematic diagram three of a frequency spectrum of an example first TBC in a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 9 is schematic diagram four of a frequency spectrum of an example first TBC in a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 10 is schematic diagram five of a frequency spectrum of an example first TBC in a transmission bandwidth configuration method provided by an embodiment of the present disclosure:

FIG. 11 is flowchart five of a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 12 is schematic diagram six of a frequency spectrum of an example first TBC in a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 13 is schematic diagram seven of a frequency spectrum of an example first TBC in a transmission bandwidth configuration method provided by an embodiment of the present disclosure;

FIG. 14 is structural diagram one of a transmitting node according to an embodiment of the present disclosure;

FIG. 15 is structural diagram two of a transmitting node according to an embodiment of the present disclosure; and

FIG. 16 is structural diagram three of a transmitting node according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

In the research process of the fifth generation mobile communication technology (5G), a carrier channel bandwidth greater than 20 MHz is introduced. For the carrier channel bandwidth greater than 20 MHz, if a proportion of TBC configured in a CB of the carrier is consistent with a proportion of the TBC configured in an LTE system, although the TCB will increase as the CB of the carrier increases, a bandwidth occupied by a guard band is also very large. Since in 5G wireless communication technology, some new multi-carrier data modulation methods are usually used to suppress out-of-band leakage, and an RF device in 5G technology will adopt more advanced manufacturing process to satisfy out-of-band unwanted emission requirements. So, when out-of-band requirements of the multi-carrier system in the 5G wireless communication technology satisfies the out-of-band unwanted emission requirements, the guard band occupies a large bandwidth, which results the waste of spectrum resources.

The technical solutions of the embodiments of the present disclosure are clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.

Example One

The embodiment of the present disclosure provides a transmission bandwidth configuration method. As shown in FIG. 1 , the method may include the steps described below.

In step S101, a first CB of a carrier is configured.

In step S102, in response to determining that the first CB is greater than a first preset bandwidth, subcarriers in a first TBC is configured according to the first CB and a preset percentage X1 of the first TBC in the first CB, so as to complete a subcarrier configuration in a transmission bandwidth configuration. A preset percentage X1 is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90% and the preset upper limit value is less than 100%, and X1 is determined when the out-of-band unwanted emission requirements is satisfied.

The embodiment of the present disclosure provides a transmission bandwidth configuration method which is applied to a transmitting node in a multi-carrier system. The method is mainly used in a relatively large channel bandwidth, for example, when the channel bandwidth is greater than 20 MHz, it is just required that the channel bandwidth is greater than a preset bandwidth, which is not limited in the embodiments of the present disclosure.

In the embodiment of the present disclosure, the transmitting node of the multi-carrier system may include: a base station, a terminal, a relay, a transmitting point or any other transmitting device.

In the embodiment of the present disclosure, in the multi-carrier transmission system, the transmitting node may support transmissions of various kinds of carriers. Here, the transmitting node may configure a first CB of a carrier, the first CB is a radio frequency bandwidth of the carrier supported by the transmitting node, and the first CB is one channel bandwidth being used in at least one channel bandwidth of the carrier, where the at least one channel bandwidth of the carrier is a channel bandwidth of the carrier supported by the transmitting node. In the embodiment of the present disclosure, a process of transmission bandwidth configuration of one current carrier is illustrated. In response to determining that the first CB is greater than the first preset bandwidth, the transmitting node may configure subcarriers in the first TBC according to the preset percentage X1 of the first TBC in the first CB and the first CB, so as to complete the subcarrier configuration in the transmission bandwidth configuration. A preset percentage X1 is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90% and the preset upper limit value is less than 100%. X1 may be determined when the out-of-band unwanted emission requirements are satisfied. The first TBC is a total bandwidth of physical time-frequency resources in a frequency domain in the first CB.

In the embodiment of the present disclosure, the preset lower limit value may be 92%, and the preset upper limit value may be 96%. The first preset bandwidth may be 5 MHz or 20 MHz. In the embodiment of the present disclosure, it is just required that the preset lower limit value is greater than 90% and the preset upper limit value is less than 100%, which are not limited in the embodiment of the present disclosure. At the same time, the size of the preset bandwidth is also not limited in the embodiment of the present disclosure, and an example value of the preset bandwidth satisfies: as subcarrier spacings increase, the first preset bandwidth also increases.

For the multi-carrier system in the embodiment of the present disclosure, the channel bandwidth (the first CB) of the carrier is a radio frequency bandwidth supported by the carrier in the transmitting node in the multi-carrier system and is usually composed of a TBC and a guard band (GB). A center frequency of the channel bandwidth is located at a middle position of the channel bandwidth. In the embodiment of the present disclosure, the TBC is a maximum transmission bandwidth that the transmitting node is able to support within the channel bandwidth of the multi-carrier system. The actual transmission bandwidth (TB) is a frequency bandwidth at which the transmitting node instantaneously transmits data. The size of the transmission bandwidth may be any value, but a maximum value cannot exceed the transmission bandwidth configuration. Therefore, the TBC is greater than or equal to the TB.

In one example embodiment, as shown in FIG. 2 , the relationship of these frequencies is: f₂>f₄>f₀>f₂>f₁, the first CB=f₂−f₁, and a center frequency f₀ of the first CB is (f₂+f₁)/2, the configured first TBC=f₄−f₆, therefore, the first TBC is also defined as a frequency range between the most edges of two available subcarriers allocated at two sides of the first CB respectively.

When the first CB of the carrier of the transmitting node in the multi-carrier system is greater than 20 MHz, the percentage X of the first TBC in the first CB is: X=TBC/CB*100%, and X is within a range of [92%, 96%], i.e., X=(f ₄ −f ₃)/(f ₂ −f ₁)*100%, where the value range of X is [92%,96%].

In one example embodiment, as shown in FIG. 3 , a transmission bandwidth configuration method provided by an embodiment of the present disclosure further includes steps S103 to S105 after the step S102.

In step S103, a percentage Y of a first GB in the first CB is determined according to the preset percentage X of the first TBC in the first CB.

The first CB is composed of the first TBC and the first GB. Therefore, a relationship between the preset percentage X of the first TBC in the first CB and the percentage Y of the first GB in the first CB is: Y=1−X.

In the multi-carrier system, the GB is located outside the TBC and includes two parts: a left guard band and a right guard band; as shown in FIG. 2 , a guard band on a left side of the TBC is called as the left guard band, and a guard band on a right side of the TBC is called as the right guard band. In the embodiment, a combination of the left guard band and the right guard band is called the guard band (GB).

In one example embodiment, as shown in FIG. 2 , the bandwidth of the left guard band equals f₆−f₁, and the bandwidth of the right guard band equals f₂−f₄. The percentage Y of the first GB in the first CB is: Y=GB/CB*100%=Y=1−X. Therefore, Y is in a range of [4%, 8%], which may be expressed by a formula: Y=[(f ₃ −f ₁)+(f ₂ −f ₄)]/(f ₂ −f ₁)*100%, where the value range of Y is [4%,8%].

In step S104, the first GB is determined according to the percentage Y of the first GB in the first CB and the first CB.

After the transmitting node determines the percentage Y of the first GB in the first CB according to the preset percentage X of the first TBC in the first CB, the transmitting node acquires the percentage Y of the first GB in the first CB. Therefore, when the transmitting node acquires the first CB, the transmitting node may calculate a bandwidth occupied by the first GB.

In step S105, the left guard band and the right guard band of the first GB are determined according to the subcarrier configuration in the first TBC and the first GB.

After the transmitting node determines the first GB according to the percentage Y of the first GB in the first CB and the first CB, the transmitting node may determine bandwidth configuration of the first CB according to the subcarrier configuration in the first TBC. Therefore, the first GB may configure the first GB on the left and right sides of the first TBC according to the configuration of the first TBC in the first CB, thereby determining the left guard band and the right guard band of the first GB. In the first CB, the left side of the first TBC is filled to a starting frequency to the first CB, the right side of the first TBC is filled to an ending frequency to the first CB, thereby determining the left guard band and the right guard band of the first GB.

In the embodiment of the present disclosure, the left guard band and the right guard band are symmetric or asymmetric with respect to the center frequency of the first CB. Whether the left guard band and the right guard band of the first GB are symmetric may be determined according to a time-frequency resource configuration of the first TBC. The time-frequency resource configuration of the first TBC in different cases will be described in detail in the subsequent embodiments.

In one example embodiment, as shown in FIG. 4 , a transmission bandwidth configuration method provided by an embodiment of the present disclosure further includes a step S106 after the step S102.

In step S106, a second CB and a preset percentage X2 of a transmission bandwidth configuration (TBC) corresponding to the second CB in the second CB are configured. The first CB and the second CB are different channel bandwidth configurations of the transmitting node.

The transmitting node may support various kinds of CBs in the multi-carrier system. The principle of a configuration process of the second CB is the same as that of the first CB.

In a case that the transmitting node is able to support multiple kinds of channel bandwidths, when the second CB is greater than the first CB, the preset percentage X2 of the second TBC in the second CB is greater than or equal to the preset percentage X1 of the first TBC in the first CB; or, when the second CB is less than the first CB, the preset percentage X2 of the second TBC in the second CB is less than or equal to the preset percentage X1 of the first TBC in the first CB. That is, when the CB of the carrier supported by the transmitting node increases, the percentage X of the TBC in the CB is monotonically increases. It is assumed that a channel bandwidth CB1 is greater than a channel bandwidth CB2, a proportion of a TBC1 in the CB1 is X1, a proportion of a TBC2 in the CB2 is X2, and X1≥X2 is satisfied. A proportion of a guard band GB1 in the CB1 is Y1, and a proportion of a guard band GB2 in the CB2 is Y2, and Y2≥Y1 is satisfied. When the second CB is less than the first CB, the preset percentage X2 of the second TBC in the second CB is less than or equal to the preset percentage X1 of the first TBC in the first CB.

In the embodiment of the present disclosure, under a condition that, in response to determining that the second CB is greater than the first CB, the preset percentage X2 of the second TBC in the second CB is greater than or equal to the preset percentage X1 of the first TBC in the first CB, the first CB and the second CB may be in a same multi-carrier system or in different multi-carrier systems, which is not limited by the embodiments of the present disclosure.

It is to be understood that in the transmission bandwidth configuration method provided by the embodiments of the present disclosure, the transmitting node reduces the bandwidth of the guard band by increasing the bandwidth of the transmission bandwidth configuration, so that, under the premise of satisfying the out-of-band requirements, not only more data can be transmitted in the limited channel bandwidth to increase a system peak transmission rate, but also spectrum utilization can be improved.

The transmission bandwidth configuration method provided by the embodiments of the present disclosure not only can be compatible with a subcarrier spacing of 15 kHz in an original LTE system, but also can be compatible with other possible subcarrier spacings, thereby having a strong compatibility.

Example Two

Based on the example one, when there is no direct current subcarrier to be configured in a first TBC, as shown in FIG. 5 , a transmitting node configures subcarriers in the first TBC according to a first CB and a preset percentage X of the first TBC in the first CB through the steps described below.

In step S201, the first TBC is determined according to the first CB and the preset percentage X of the first TBC in the first CB.

The transmitting node acquires the percentage X of the first TBC in the first CB. Therefore, at the time of the transmitting node acquiring the first CB, the transmitting node may calculate a bandwidth occupied by the first TBC.

In step S202, various subcarrier spacings supported by the transmitting node are configured. Each subcarrier represents an available subcarrier.

The transmitting node may support various kinds of subcarriers in the multi-carrier system. Therefore, the transmitting node may configure and determine the various subcarrier spacings.

In step S203, the maximum number of subcarriers configured in the first TBC is determined according to the first TBC and the various subcarrier spacings. The first TBC is a total bandwidth of all the configured subcarriers.

After the transmitting node obtains the various subcarrier spacings supported by the transmitting node, the transmitting node determines which kind or kinds of subcarriers may be selected for configuring the first TBC. Then the transmitting node determines the maximum number of subcarriers configured in the first TBC according to the first TBC and the selected subcarrier spacing(s). The first TBC is the total bandwidth of all the configured subcarriers.

In step S204, the first TBC is configured according to the maximum number of subcarriers.

After the transmitting node determines the maximum number of subcarriers configured in the first TBC according to the first TBC and the various subcarrier spacings, the transmitting node may configure on the first TBC according to the various kinds of subcarriers and the number of the subcarriers to complete the configuration of the first TBC.

When there is no direct current subcarrier to be configured in the first TBC and the first TBC configures one kind of subcarriers, the configuration of the first TBC provided by the embodiment of the present disclosure is as follows.

In the embodiment of the present disclosure, for the multi-carrier system composed of multiple consecutive subcarriers, it is assumed that the maximum number of available subcarriers (the maximum number of subcarriers) configured on the first TBC is i, the consecutive subcarriers from left to right are numbered from #1 to #i, and all the i subcarriers transmit data.

It is assumed that time-frequency resources in the first TBC include one subcarrier spacing Δf, and Δf may be 15 kHz in the LTE system or another newly defined subcarrier spacing.

In the embodiment, the first TBC is the total bandwidth of physical time-frequency resources in a frequency domain in the first CB, or the first TBC is a frequency range between the most edges of two available subcarriers allocated at two sides of the first CB respectively. That is, the first TBC=i×Δf or the first

${TBC} = {\sum\limits_{1}^{i}{\Delta{f.}}}$ Under the premise of satisfying out-of-band unwanted emission requirements, the maximum number i of the available subcarriers may be configured to make the proportion of the first TBC in the first CB is within the range mentioned in the embodiment of the present disclosure.

The guard bands (the first GB) on both sides outside the first TBC are described as follows.

As shown in FIG. 6 , when j=(i+1)/2 (i is an odd number) and a center frequency of a #j^(th) subcarrier is aligned with a center frequency of a channel bandwidth, a total bandwidth of all (j−1) subcarriers in a number range from #1 to #(j−1) is equal to a total bandwidth of all (i−j) subcarriers in a number range from #(j+1) to #i., then f₀−f₃=f₄−f₀, then guard bands on two sides outside the first TBC are symmetric, i.e., f₃−f₁=f₂−f₄. When j is any other integer or the center frequency of the #j^(th) subcarrier is not aligned with the center frequency of the first CB, as shown in FIG. 7 , the total bandwidth of all (j−1) subcarriers in the number range from #1 to #(j−1) is not equal to the total bandwidth of all (i−j) subcarriers in the number range from #(j+1) to #i, then f₀−f₃≠f₄−f₀, then the guard bands on two sides outside the first TBC are not symmetric, i.e., f₃−f₁≠f₂−f₄.

As shown in FIG. 8 , when j=i/2 (i is an even number) and the #j^(th) subcarrier and a #+1)^(th) subcarrier are adjacent to two side of the center frequency of the CB. A total bandwidth of all j subcarriers in a number range from #1 to #j is equal to a total bandwidth of all (i−j) subcarriers in a number range from #(j+1) to #i, then f₀−f₃=f₄−f₀, then guard bands on two sides outside the first TBC are symmetric, i.e., f₃−f₁=f₂−f₄. When j is any other integer or the #j^(th) subcarrier and the #(j+1)^(th) subcarrier are not adjacent to two sides of the center frequency of the CB, as shown in FIG. 9 , the total bandwidth of all j subcarriers in the number range from #1 to #j is not equal to the total bandwidth of all (i−j) subcarriers in the number range from #(j+1) to #i, then f₀−f₃≠f₄−f₀, then the guard bands on two sides outside the first TBC are not symmetric, i.e., f₄−f₁≠f₂−f₄.

When there is no direct current subcarrier to be configured in the first TBC and the first TBC configures multiple kinds of subcarriers, the configuration of the first TBC provided by the embodiment of the present disclosure is as follows.

In the embodiment, for the multi-carrier system composed of multiple consecutive subcarriers, the maximum number of available subcarriers configured on the first TBC is i, the consecutive subcarriers are numbered from #1 to #i from left to right, and all i subcarriers transmit data.

As shown in FIG. 10 , it is assumed that time-frequency resources in the first TBC include various kinds of subcarrier spacings Δf, and Δf may be 15 kHz in the LTE system, or be other newly defined subcarrier spacings. The center frequency of the #j*^(h) subcarrier may be unaligned with the center frequency of the CB or the center frequency of the first CB. All (j−1) subcarriers in the number range from #1 to #(j−1) may support one or more subcarrier spacings, also all (i−j) subcarriers in the number range from #(j+1) to #i may support one or more subcarrier spacings, and all i subcarriers support at least two kinds of subcarrier spacings.

In one embodiment, the first TBC is a frequency range from a left edge of the #1^(th) subcarrier to a right edge of the #i^(th) subcarrier, i.e., the first TBC equals

${\sum\limits_{k = 1}^{i}{\Delta f_{k}}},$ where Δf_(k) is a k^(th) subcarrier spacing. Under the premise of satisfying out-of-band unwanted emission requirements, through configuring the maximum number of available subcarriers i by the transmitting node, the proportion of the first TBC in the first CB is within the range mentioned in the embodiment of the present disclosure.

For the left and right guard bands of the first GB outside the first TBC, through configuring subcarriers with different bandwidths and the number of subcarriers with different bandwidths,

-   -   1) if f₀−f₃=f₄−f₀, then the left and right guard bands of the         first GB outside the first TBC are symmetric, i.e., f₃−f₁=f₂−f₄;     -   2) if f₀−f₃f₄−f₀, then the left and right guard bands of the         first GB outside the first TBC are not symmetric, i.e.,         f₃−f₁≠f₂−f₄.

The embodiments of the present disclosure will be described below in detail through experiments.

In the traditional LTE multi-carrier system, using LTE uplink as an example, there is no direct current subcarrier in LTE uplink configuration, and the maximum proportion of the first TBC in the first CB is 90%. Taking the maximum channel bandwidth of 20 MHz supported by the LTE system as an example, the supported maximum number i of subcarriers is i=1200, and the spacings Δf between every adjacent subcarriers are equal, i.e., Δf=15 kHz. Then the first TBC=i*Δf=18 MHz, the left and right guard bands of the first GB outside the first TBC are symmetric, and each of the left and right guard bands is 1 MHz, satisfying the out-of-band unwanted emission requirements in LTE protocols.

In the research process of millimeter wave communication which is one of 5G technologies, a carrier channel bandwidth greater than 20 MHz is introduced, and other new-defined subcarrier spacings may be supported. It is assumed that the CB of the carriers supported by the transmitting node in the 5G multi-carrier system equals 100 MHz. If the transmission bandwidth configuration method in the traditional LTE multi-carrier system is adopted, the TBC equals 90 MHz. With the transmission bandwidth configuration method in the embodiment of the present disclosure, a value range of X is [92%, 96%], and a value range of the first TBC is [92 MHz, 96 MHz]

-   -   1. In a case that the multi-carrier system supports only one         subcarrier spacing, and the subcarrier spacing Δf is equal to a         subcarrier spacing of LTE, i.e., Δf=15 kHz.     -   a) According to the transmission bandwidth configuration method         in the traditional LTE multi-carrier system, in the channel         bandwidth of 100 MHz, the supported maximum number I of         subcarriers is i=90 MHz/Δf=6000, and the guard bands on two         sides outside the transmission bandwidth configuration are         symmetric.     -   b) Using the transmission bandwidth configuration method in the         multi-carrier system in the embodiment of the present         disclosure, in the channel bandwidth of 100 MHz, under the         premise of satisfying the out-of-band unwanted emission         requirements, the maximum number i of subcarriers may be         configured within a range of (6133, 6400], so that 96 MHz≥i*15         kHz≥92 MHz, i.e., the proportion of the first TBC in the first         CB is within the range mentioned in the embodiment of the         present disclosure. At the same time, through configuring         placing positions of all i subcarriers within the channel         bandwidth, the guard bands of the first GB at the left and right         sides outside the first TBC may be symmetrical or asymmetric.     -   2. In a case that the multi-carrier system supports one (e.g.,         only one) subcarrier spacing, and Δf is equal to another newly         defined subcarrier spacing, such as Δf=30 kHz.     -   a) According to the transmission bandwidth configuration method         in the traditional LTE multi-carrier system, in the channel         bandwidth of 100 MHz, the supported maximum number i of         subcarriers is i=90 MHz/Δf=3000, and the guard bands, on the         left and right sides, of the first GB are symmetric.     -   b) Using the transmission bandwidth configuration method in the         multi-carrier system in the embodiment of the present         disclosure, in the channel bandwidth of 100 MHz, under the         premise of satisfying the out-of-band unwanted emission         requirements, the maximum number i of subcarriers may be         configured within a range of (3066, 3200], so that 96 MHz≥i*30         kHz≥92 MHz, i.e., the proportion of the first TBC in the first         CB is within the range mentioned in the embodiment of the         present disclosure. At the same time, through configuring         placing positions of all i subcarriers within the first CB, the         guard bands of the first GB, which are at the left and right         sides respectively and outside the first TBC, may be symmetrical         or asymmetric.     -   3. In a case that the system supports various subcarrier         spacings, such as supporting two kinds of subcarrier spacings,         Δg1=15 kHz and Δf2=30 kHz.     -   a) According to the transmission bandwidth configuration method         in the traditional LTE multi-carrier system, it is assumed that         the numbers of subcarriers are a₁ and a₂ corresponding to the         subcarrier spacings Δg1 and Δf2 respectively. In the channel         bandwidth of 100 MHz, a₁*15 kHz+a₂*30 kHz=90 MHz, and the guard         bands of the first GB, which are at the left and right sides         respectively and outside the first TBC, are symmetric.     -   b) Using the transmission bandwidth configuration method in the         multi-carrier system in the embodiment of the present         disclosure, it is assumed that the numbers of subcarriers are b₁         and b₂ corresponding to the subcarrier spacings Δg1 and Δf2         respectively. In the channel bandwidth of 100 MHz, under the         premise of satisfying the out-of-band unwanted emission         requirements, through configuring the numbers of subcarriers         corresponding to different subcarrier spacings, 96 MHz≥b₁*15         kHz+b₂*30 kHz≥92 MHz, i.e., the proportion of the first TBC in         the first CB is within the range mentioned in the embodiment of         the present disclosure. At the same time, through configuring         placing positions of different b_(t) and b₂ as well as all         subcarriers within the first CB, the guard bands of the first         GB, which are at the left and right sides respectively and         outside the first TBC may be symmetrical or asymmetric.

It is to be understood that, in the transmission bandwidth configuration method provided by the embodiments of the present disclosure, the transmitting node reduces the bandwidth size of the guard band by increasing the bandwidth size of the transmission bandwidth configuration. In this way, under the premise of satisfying the out-of-band requirements, not only more data can be transmitted in the limited channel bandwidth to increase the system peak transmission rate, but also spectrum utilization can be improved.

The transmission bandwidth configuration method provided by the embodiment of the present disclosure not only can be compatible with a subcarrier spacing of 15 kHz in the original LTE system, but also can be compatible with other possible subcarrier spacings, which has a strong compatibility.

Example Three

Based on the example one, when there is a direct current subcarrier to be configured in a first TBC, as shown in FIG. 11 , a transmitting node configures subcarriers in the first TBC according to a first CB and a preset percentage X of the first TBC in the first CB through the steps described below.

In step S301, the first TBC is determined according to the first CB and the preset percentage X of the first TBC in the first CB.

The transmitting node acquires the percentage X of the first TBC in the first CB. Therefore, when the transmitting node acquires the first CB, the transmitting node may calculate a bandwidth occupied by the first TBC.

In step S302, one or more subcarrier spacings and a direct current subcarrier spacing supported by the transmitting node are configured, and each subcarrier represents an available subcarrier.

The transmitting node may support multiple kinds of subcarriers in the multi-carrier system. Therefore, the transmitting node may configure to determine one or more subcarrier spacings. In the embodiment of the present disclosure, there is the direct current subcarrier to be configured in the first TBC, the direct current subcarrier does not transmit any data and is located in the middle of the first CB, and a center frequency of the direct current subcarrier is aligned with a center frequency of the first CB.

In step S303, a total bandwidth of all the subcarriers is determined according to the first TBC and the direct current subcarrier spacing.

After the transmitting node configures the one or more subcarrier spacings supported by the transmitting node, the transmitting node subtracts the direct current subcarrier spacing from the first TBC to obtain the total bandwidth of all the subcarriers.

In step S304, the maximum number of subcarriers configured in the first TBC is determined according to the total bandwidth of all the subcarriers and the one or more subcarrier spacings.

After the transmitting node configures the total bandwidth of all the subcarriers supported by the transmitting node, the transmitting node determines which kind or kinds of subcarriers may be selected for configuring the first TBC, then the transmitting node determines the maximum number of subcarriers configured in the first TBC according to the first TBC and the selected subcarrier spacing(s).

In step S305, the first TBC is configured according to the maximum number of subcarriers and the direct current subcarrier. The center frequency of the direct current subcarrier is consistent with the center frequency of the first CB.

The transmitting node determines the maximum number of subcarriers configured in the first TBC according to the first TBC and the subcarrier spacing(s), and then the transmitting node may configure on the first TBC according to various subcarriers and the number of each of the various subcarriers to complete the configuration of the first TBC.

When there is the direct current subcarrier to be configured in the first TBC and the first TBC configures one kind of subcarriers, the configuration of the first TBC provided by the embodiment of the present disclosure is as follows.

In this embodiment, it is assumed that the multi-carrier system, in which the CB of the carrier supported by the transmitting node is greater than 20 MHz, includes the direct current subcarrier, the direct current subcarrier does not transmit any data and is located in the middle of the channel bandwidth, the center frequency of the direct current subcarrier is aligned with the center frequency of the first CB.

As shown in FIG. 12 , for the multi-carrier system composed of multiple consecutive subcarriers, the maximum number of available subcarriers configured by the first TBC is i, the consecutive subcarriers from left to right are numbered from #1 to #i, and the #j^(th) subcarrier and the #(j+1)^(th) subcarrier are adjacent to both sides of the direct current subcarrier.

It is assumed that time-frequency resources in the first TBC support one (e.g., only one) subcarrier spacing Δf, and the direct current subcarrier spacing is Δf_(DC). The Δf and Δf_(DC) may be 15 kHz in the LTE system, or be other new-defined subcarrier spacings.

In the embodiment, the first TBC is a frequency range from the left edge of the #1^(th) subcarrier to the right edge of the #i subcarrier, including the direct current subcarriers, i.e., the first TBC equals i×Δf+Δf_(DC) or

${\sum\limits_{1}^{i}{\Delta f}} + {\Delta{f_{DC}.}}$ Under the premise of satisfying the out-of-band unwanted emission requirements, through configuring the maximum number of available subcarriers i, the proportion of the first TBC in the first CB is within the range mentioned in the embodiment of the present disclosure.

For left and right guard bands of the first GB outside the first TBC, the following two illustrations are included.

When i is an odd number, a total bandwidth of all j subcarriers in a number range from #1 to #j is not equal to a total bandwidth of all (i−j) subcarriers in a number range from #(j+1) to #i, then f₀−f₃≠f₄−f₀, and the left and right guard bands outside the first TBC are not symmetric, i.e., f₃−f₁≠f₂−f₄.

When i is an even number and j=i/2, the total bandwidth of all j subcarriers in the number range from #1 to #j is equal to the total bandwidth of all (i−j) subcarriers in the number range from #(j+1) to #i, then f₀−f₃=f₄−f₀, and the guard bands on two sides outside the first TBC are symmetric, i.e., f₃−f₄=f₂−f₄. When j is another arbitrary integer, the total bandwidth of all j subcarriers in the number range from #1 to #j is not equal to the total bandwidth of all (i−j) subcarriers in the number range from #(j+1) to #i, then f₀−f₃ f₄−f₀, and the left and right guard bands outside the first TBC are not symmetric, i.e., f₃−f₁≠f₂−f₄.

When there is the direct current subcarrier to be configured in the first TBC and the first TBC configures multiple kinds of subcarriers, the configuration of the first TBC provided by the embodiment of the present disclosure is as follows.

In the embodiment, it is assumed that the multi-carrier system, in which the first CB of the carrier supported by the transmitting node is greater than 20 MHz, includes the direct current subcarrier, the direct current subcarrier does not transmit any data and is located in the middle of the channel bandwidth, and the center frequency of the direct current subcarrier is aligned with the center frequency of the first CB.

As shown in FIG. 13 , for the multi-carrier system composed of multiple consecutive subcarriers, the maximum number of available subcarriers configured by the first TBC is i, the consecutive subcarriers from left to right are numbered from #1 to #i, and the #j^(th) subcarrier and the #(j+1)^(th) subcarrier are adjacent to both sides of the direct current subcarrier.

It is assumed that time-frequency resources in the first TBC support multiple kinds of subcarrier spacings Δf, and the direct current subcarrier spacing is Δf_(DC). The Δf and Δf_(DC) may be 15 kHz in the LTE system, or be other new-defined subcarrier spacings.

In the embodiment, the first TBC is a frequency range from the left edge of the #1^(th) subcarrier to the right edge of the #i subcarrier which includes the direct current subcarrier, i.e., the first TBC equals

${{\sum\limits_{k = 1}^{i}{\Delta f_{k}}} + {\Delta f_{DC}}},$ where Δf_(k) is a k^(th) subcarrier spacing. Under the premise of satisfying the out-of-band unwanted emission requirements, through configuring the numbers of subcarriers corresponding to different subcarrier spacings, the proportion of the first TBC in the first CB is within the range mentioned in the embodiment of the present disclosure.

All j subcarriers in the number range from #1 to #j may support one or more subcarrier spacings, while all (i−j) subcarriers in the number range from #(j+1) to #i may support one or more subcarrier spacings, and all i subcarriers support at least two kinds of subcarrier spacings.

It is assumed that all j subcarriers in the number range from #1 to #j support N subcarrier spacings, which respectively are Δf_(N1), Δf_(N2), . . . , Δf_(NN). The number of corresponding subcarriers respectively are a_(N1), a_(N2), . . . , a_(NN), and a_(N1)+a_(N2)+ . . . a_(NN)=j is satisfied. Additionally, it is assumed that all (i−j) subcarriers in the number range from #(j+1) to #i support M subcarrier spacings, which respectively are Δf_(M1), Δf_(M2), . . . , Δf_(MM). The number of corresponding subcarriers respectively are b_(M1), b_(M2), . . . , b_(MM), and b_(M1)+b_(M2)+ . . . b_(MM)=i−j is satisfied.

So, the total bandwidth of all j subcarriers in the number range from #1 to #j is: f₀−f₃−Δf_(DC)/2=

${{\sum\limits_{1}^{a_{N1}}{\Delta f_{N1}}} + {\sum\limits_{1}^{a_{N2}}{\Delta f_{N2}}} + {\ldots{\sum\limits_{1}^{a_{NN}}{\Delta f_{NN}}}}},$ and the total bandwidth of all (i−j) subcarriers in the number range from #(j+1) to #i is:

${f_{4} - f_{0} - {\Delta f_{DC}/2}} = {{\sum\limits_{1}^{b_{M1}}{\Delta f_{M1}}} + {\sum\limits_{1}^{b_{M2}}{\Delta f_{M2}}} + {\ldots{\sum\limits_{1}^{b_{MM}}{\Delta{f_{MM}.}}}}}$

For the left and right guard bands of the first GB outside the first TBC, the following parameters may be properly configured: different subcarrier spacings Δf_(N1), Δf_(N2), . . . , Δf_(NN) and Δf_(M1), Δf_(M2), . . . , Δf_(MM), and the number of corresponding subcarriers a_(N1), a_(N2), . . . , a_(NN) and b_(M1), b_(M2), . . . , b_(MM).

-   -   1. If f₀−f₂=f₄−f₀ is satisfied, the total bandwidth of all j         subcarriers in the number range from #1 to #j is equal to the         total bandwidth of all (i−j) subcarriers in the number range         from #(j+1) to #i, then the left and right guard bands outside         the first TBC are symmetric, i.e., f₃−fj=f₂−f₄.     -   2. If f₀−f₃−f₄−f₀ is satisfied, the total bandwidth of all j         subcarriers in the number range from #1 to #j is not equal to         the total bandwidth of all (i−j) subcarriers in the number range         from M(j+1) to #i, then the left and right guard bands outside         the first TBC are not symmetric, i.e., f₃−f₁≠f₂−f₄.

It is to be understood that in the transmission bandwidth configuration method provided by the embodiments of the present disclosure, the transmitting node reduces the bandwidth size of the guard band by increasing the bandwidth size of the transmission bandwidth configuration, in this way, under the premise of satisfying the out-of-band requirements, not only more data can be transmitted in the limited channel bandwidth to increasing the system peak rate, but also the spectrum utilization can be improved.

The transmission bandwidth configuration method provided by the embodiment of the present disclosure not only can be compatible with a subcarrier spacing of 15 kHz in the original LTE system, but also can be compatible with other possible subcarrier spacings, which has a strong compatibility.

Example Four

As shown in FIG. 14 , the embodiment of the present disclosure provides a transmitting node 1. The transmitting node 1 may include a configuration device 10. The configuration device 10 is configured to configure a first CB of a carrier in a multi-carrier transmission system: and in response to determining that the first CB is greater than a first preset bandwidth, configure subcarriers in a first TBC according to the first CB and a preset percentage X1 of the first TBC in the first CB so as to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X1 is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90%, and the preset upper limit value is less than 100%.

In the embodiment of the present disclosure, as shown in FIG. 15 , the transmitting node may further include a determination device 11.

The determination device is configured to, in response to determining that there is no direct current subcarrier to be configured in the first TBC, determine the first TBC according to the first CB and the preset percentage X1 of the first TBC in the first CB.

The configuration device 10 is configured to configure one or more subcarrier spacings supported by the transmitting node. Each subcarrier represents an available subcarrier.

The determination device 11 is further configured to determine a maximum number of subcarriers configured in the first TBC according to the first TBC and the one or more subcarrier spacings, where the first TBC is a total bandwidth of all the configured subcarriers.

The configuration device 10 is further configured to configure the first TBC according to the maximum number of subcarriers.

In the embodiment of the present disclosure, as shown in FIG. 15 , the transmitting node may further include a determination device 11.

The determination device 11 is configured to, in response to determining that there is a direct current subcarrier to be configured in the first TBC, determine the first TBC according to the preset percentage X1 of the first TBC in the first CB and the first CB.

The configuration device 10 is configured to acquire one or more subcarrier spacings and a direct current subcarrier spacing supported by the transmitting node. Each subcarrier represents an available subcarrier.

The determination device 11 is further configured to determine a total bandwidth of all the subcarriers according to the first TBC and the direct current subcarrier spacing; and determine the maximum number of subcarriers configured in the first TBC according to the total bandwidth of all the subcarriers and the one or more subcarrier spacings.

The configuration device 10 is further configured to configure the first TBC according to the maximum number of subcarriers and the direct current subcarrier. A center frequency of the direct current subcarrier is consistent with a center frequency of the first CB.

In the embodiment of the present disclosure, as shown in FIG. 15 , the transmitting node may further include a determination device 11.

The determination device 11 is configured to, after acquiring the first CB of the carrier, determine a percentage Y of a first GB in the first CB according to the preset percentage X1 of the first TBC in the first CB; and determine the first GB according to the percentage Y of the first GB in the first CB and the first CB.

In the embodiment of the present disclosure, the determination device 11 may further be configured to, according to the subcarrier configuration in the first TBC and the first GB, determine a left guard band and a right guard band of the first GB after configuring the subcarriers in the first TBC according to the preset percentage X1 of the first TBC in the first CB and the first CB.

In the embodiment of the present disclosure, the left guard band and the right guard band are symmetric or asymmetric with respect to the center frequency of the first CB.

In the embodiment of the present disclosure, the configuration device 10 may also be configured to configure the subcarriers in the first TBC according to the preset percentage X1 of the first TBC in the first CB and the first CB; and configure a second CB and a preset percentage X2 of a second TBC in the second CB and configure subcarriers in the second TBC. The first CB and the second CB are different channel bandwidth configurations of the transmitting node.

In the embodiment of the present disclosure, in response to determining that the second CB is greater than the first CB, the preset percentage X2 of the second TBC in the second CB is greater than or equal to the preset percentage X1 of the first TBC in the first CB.

In the embodiment of the present disclosure, the first CB may be a radio frequency bandwidth of the carrier supported by the transmitting node, the first CB may be one channel bandwidth being used in channel bandwidths of at least one carrier, and the channel bandwidths of at least one carrier may be channel bandwidths of the carriers supported by the transmitting node.

The first TBC is a total bandwidth of physical time-frequency resources in a frequency domain in the first CB, or the first TBC is a frequency range between the most edges of available subcarriers allocated at two sides of the first CB.

In the embodiment of the present disclosure, the preset lower limit value may be 92% and the preset upper limit value may be 96%, where X1 is determined when an out-of-band unwanted emission requirements condition is satisfied.

As shown in FIG. 16 , in practical applications, the determination device 11 and the configuration device 10 may be implemented by a processor 12 located on the transmitting node, such as a central processing device (CPU), a micro-processor device (MPU), a digital signal processor (DSP), a field programmable gate array (FPGA), or the like. The transmitting node further includes: a storage medium 13, which may be connected to the processor 12 through a system bus 14. The storage medium 13 is configured to store executable program codes which include computer program instructions. The storage medium 13 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

In the embodiment of the present disclosure, the transmitting node of the multi-carrier system may include: a base station, a terminal, a relay, a transmitting point or other transmitting devices.

The embodiments of the present disclosure further provide a transmitting node, which includes: a processor and a storage medium storing processor-executable instructions which, when executed by the processor, execute the following operations.

The processor is configured to configure a first CB of a carrier, and in response to determining that the first CB is greater than a first preset bandwidth, configure subcarriers in a first TBC according to the first CB and a preset percentage X1 of the first TBC in the first CB so as to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X1 is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90%, and the preset upper limit value is less than 100%, and X1 is determined when the out-of-band unwanted emission requirements is satisfied.

In the embodiment of the present disclosure, the processor may further be configured to, in response to determining that there is no direct current subcarrier to be configured in the first TBC, determine the first TBC according to the preset percentage X1 of the first TBC in the first CB and the first CB; and configure one or more subcarrier spacings supported by the transmitting node, where each subcarrier represents an available subcarrier; and determine a maximum number of subcarriers configured in the first TBC according to the first TBC and the one or more subcarrier spacings, where the first TBC is a total bandwidth of all the configured subcarriers; and configure the first TBC according to the maximum number of subcarriers.

In the embodiment of the present disclosure, the processor may also be configured to, in response to determining that there is a direct current subcarrier to be configured in the first TBC, determine the first TBC according to the preset percentage X1 of the first TBC in the first CB and the first CB; and configure one or more subcarrier spacings and a direct current subcarrier spacing supported by the transmitting node, where each subcarrier represents an available subcarrier; and determine a total bandwidth of all the subcarriers according to the first TBC and the direct current subcarrier spacing; determine the maximum number of subcarriers configured in the first TBC according to the total bandwidth of all the subcarriers and the one or more subcarrier spacings; and configure the first TBC according to the maximum number of subcarriers and the direct current subcarrier, where a center frequency of the direct current subcarrier is consistent with a center frequency of the first CB.

In the embodiment of the present disclosure, the processor may also be configured to determine, after configuring the first CB of the carrier, a percentage Y of a first GB in the first CB according to the preset percentage X1 of the first TBC in the first CB; and determine the first GB according to the percentage Y of the first GB in the first CB and the first CB.

In the embodiment of the present disclosure, the processor may further be configured to, after configuring the subcarriers in the first TBC according to the preset percentage X1 of the first TBC in the first CB and the first CB, determine a left guard band and a right guard band of the first GB according to the subcarrier configuration in the first TBC and the first GB.

In the embodiment of the present disclosure, the left guard band and the right guard band may be symmetric or asymmetric with respect to the center frequency of the first CB.

In the embodiment of the present disclosure, the processor may further be configured to configure the subcarriers in the first TBC according to the first CB and the preset percentage X1 of the first TBC in the first CB; and configure a second CB and a preset percentage X2 of a TBC, which corresponds to the second CB, in the second CB, and configure subcarriers in the second TBC. The first CB and the second CB are different channel bandwidth configurations of the transmitting node.

In the embodiment of the present disclosure, in response to determining that the second CB is greater than the first CB, the preset percentage X2 of the second TBC in the second CB may be greater than or equal to the preset percentage X1 of the first TBC in the first CB.

In the embodiment of the present disclosure, the first CB may be a radio frequency bandwidth of the carrier supported by the transmitting node, the first CB may be one channel bandwidth being used in channel bandwidths of at least one carrier, and the channel bandwidths of at least one carrier may be channel bandwidths of the carriers supported by the transmitting node.

The first TBC is a total bandwidth of physical time-frequency resources in a frequency domain in the first CB, or the first TBC is a frequency range between the most edges of available subcarriers allocated at two sides of the first CB.

In the embodiment of the present disclosure, the preset lower limit value is 92% and the preset upper limit value is 96%, where X1 is determined when an out-of-band unwanted emission requirements condition is satisfied.

Moreover, the embodiment of the present disclosure provides a computer-readable storage medium configured to store computer-executable instructions which, when executed by a processor, implement any one of the above-mentioned methods.

It is to be understood that, in the transmission bandwidth configuration method provided by the embodiments of the present disclosure, the transmitting node reduces the bandwidth size of the guard band by increasing the bandwidth size of the transmission bandwidth configuration, in this way, under the premise of satisfying the out-of-band leakage requirements, not only more data can be transmitted in the limited channel bandwidth to increase the system peak transmission rate, but also the spectrum utilization can be improved.

It should be understood by those skilled in the art that functional modules/devices in all or part of the steps of the method, the system and the device disclosed above may be implemented as software, firmware, hardware and appropriate combinations thereof. In the hardware implementation, division of the functional modules/devices mentioned in the above description may not correspond to division of physical components. For example, one physical component may have several functions, or one function or step may be executed jointly by several physical components. Some or all components may be implemented as software executed by processors such as digital signal processors or microcontrollers, hardware, or integrated circuits such as application specific integrated circuits. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium). As is known to those skilled in the art, the term, computer storage medium, includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data).

The computer storage medium includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory or other memory technologies, a compact disc read-only memory (CD-ROM), a digital versatile disc (DVD) or other optical disc storage, a magnetic cassette, a magnetic tape, a magnetic disk storage or other magnetic storage devices, or any other medium used for storing desired information and accessed by a computer. In addition, as is known to those skilled in the art, the communication medium generally includes computer-readable instructions, data structures, program modules or other data in modulated data signals such as carriers or other transmission mechanisms, and may include any information delivery medium.

The above are only example embodiments of the present disclosure and are not intended to limit the scope of the present disclosure.

INDUSTRIAL APPLICABILITY

Embodiments of the present disclosure provide a transmission bandwidth configuration method and a transmitting node. The method includes: configuring a first channel bandwidth (CB) of a carrier; and, in response to determining that the first CB is greater than a first preset bandwidth, configuring subcarriers in a first TBC according to the first CB and a preset percentage X of the TBC in the first CB so as to complete a subcarrier configuration in a transmission bandwidth configuration. The preset percentage X is within a range of [a preset lower limit value, a preset upper limit value], the preset lower limit value is greater than 90% and the preset upper limit value is less than 100%. With the solutions described above, in the transmission bandwidth configuration method provided by the embodiments of the present disclosure, the transmitting node reduces the bandwidth of the guard band by increasing the bandwidth of the transmission bandwidth configuration. In this way, under the premise of satisfying out-of-band leakage requirements, not only more data can be transmitted in the limited channel bandwidth to increase the system peak transmission rate, but also the spectrum utilization can be improved. Therefore, the present disclosure has industrial applicability. 

What is claimed is:
 1. A method performed by a communication apparatus, the method comprising: configuring a first channel bandwidth (CB) of a first carrier; configuring a first transmission bandwidth configuration (TBC) corresponding to the first CB according to a first predefined relationship between the first CB and the first TBC; configuring a first guard band and a second guard band in the first CB that are located on opposite sides of the first TBC, respectively, wherein the first and second guard bands are asymmetric with respect to a center frequency of the first CB; and transmitting data using a frequency bandwidth according to the first TBC.
 2. The method of claim 1, wherein the first CB is greater than a preset bandwidth, the first predefined relationship indicates a first percentage of the first CB that the first TBC occupies, the first percentage greater than 90% and less than 100%.
 3. The method of claim 2, wherein the first percentage is between 92% and 96%.
 4. The method of claim 1, further comprising: configuring a second CB of the first carrier; configuring a second TBC corresponding to the second CB of the first carrier according to a second predefined relationship between the second CB and the second TBC; configuring a third guard band and a fourth guard band in the second CB that are located on opposite sides of the second TBC, respectively, wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB; and transmitting the data using a second frequency bandwidth according to the second TBC.
 5. The method of claim 1, further comprising: configuring a second CB of a second carrier; configuring a second TBC corresponding to the second CB of the second carrier according to a second predefined relationship between the second CB and the second TBC; configuring a third guard band and a fourth guard band in the second CB that are located on opposite sides of the second TBC, respectively, wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB; and transmitting the data using a second frequency bandwidth according to the second TBC.
 6. A wireless communications apparatus comprising: at least one processor configured to: configure a first channel bandwidth (CB) of a first carrier; configure a first transmission bandwidth configuration (TBC) corresponding to the first CB according to a first predefined relationship between the first CB and the first TBC; configure a first guard band and a second guard band in the first CB that are located on opposite sides of the first TBC, respectively, wherein the first and second guard bands are asymmetric with respect to a center frequency of the first CB; and transmit data using a frequency bandwidth according to the first TBC.
 7. The wireless communications apparatus of claim 6, wherein the first CB is greater than a preset bandwidth, the first predefined relationship indicates a first percentage of the first CB that the first TBC occupies, the first percentage greater than 90% and less than 100%.
 8. The wireless communications apparatus of claim 7, wherein the first percentage is between 92% and 96%.
 9. The wireless communications apparatus of claim 6, wherein the at least one processor is further configured to: configure a second CB of the first carrier; configure a second TBC corresponding to the second CB of the first carrier according to a second predefined relationship between the second CB and the second TBC; configure a third guard band and a fourth guard band in the second CB that are located on opposite sides of the second TBC, respectively, wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB; and transmit the data using a second frequency bandwidth according to the second TBC.
 10. The wireless communications apparatus of claim 6, wherein the at least one processor is further configured to: configure a second CB of a second carrier; configure a second TBC corresponding to the second CB of the second carrier according to a second predefined relationship between the second CB and the second TBC; configure a third guard band and a fourth guard band in the second CB that are located on opposite sides of the second TBC, respectively, wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB; and transmit the data using a second frequency bandwidth according to the second TBC.
 11. A method performed by a communication apparatus, comprising: acquiring a first channel bandwidth (CB) of a first carrier; and acquiring a first transmission bandwidth configuration (TBC) corresponding to the first CB, wherein the first TBC is configured according to a first predefined relationship between the first CB and the first TBC, and wherein a first guard band and a second guard band are configured in the first CB that are located on opposite sides of the first TBC, respectively, and wherein the first and second guard bands are asymmetric with respect to a center frequency of the first CB.
 12. The method of claim 11, wherein the first CB is greater than a preset bandwidth, the first predefined relationship indicates a first percentage of the first CB that the first TBC occupies, the first percentage greater than 90% and less than 100%.
 13. The method of claim 12, wherein the first percentage is between 92% and 96%.
 14. The method of claim 11, further comprising: acquiring a second CB of the first carrier; acquiring a second TBC corresponding to the second CB of the first carrier, wherein the second TBC is configured according to a second predefined relationship between the second CB and the second TBC, wherein a third guard band and a fourth guard band are configured in the second CB that are located on opposite sides of the second TBC, respectively, and wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB.
 15. The method of claim 11, further comprising: acquiring a second CB of a second carrier; acquiring a second TBC corresponding to the second CB of the second carrier, wherein the second TBC is configured according to a second predefined relationship between the second CB and the second TBC, wherein a third guard band and a fourth guard band are configured in the second CB that are located on opposite sides of the second TBC, respectively, and wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB.
 16. A wireless communications apparatus comprising: at least one processor configured to: acquire a first channel bandwidth (CB) of a first carrier; and acquire a first transmission bandwidth configuration (TBC) corresponding to the first CB, wherein the first TBC is configured according to a first predefined relationship between the first CB and the first TBC, and wherein a first guard band and a second guard band are configured in the first CB that are located on opposite sides of the first TBC, respectively, and wherein the first and second guard bands are asymmetric with respect to a center frequency of the first CB.
 17. The wireless communications apparatus of claim 16, wherein the first CB is greater than a preset bandwidth, the first predefined relationship indicates a first percentage of the first CB that the first TBC occupies, the first percentage greater than 90% and less than 100%.
 18. The wireless communications apparatus of claim 17, wherein the first percentage is between 92% and 96%.
 19. The wireless communications apparatus of claim 16, wherein the at least one processor is further configured to: acquire a second CB of the first carrier; and acquire a second TBC corresponding to the second CB of the first carrier, wherein the second TBC is configured according to a second predefined relationship between the second CB and the second TBC, wherein a third guard band and a fourth guard band are configured in the second CB that are located on opposite sides of the second TBC, respectively, and wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB.
 20. The wireless communications apparatus of claim 16, wherein the at least one processor is further configured to: acquire a second CB of a second carrier; and acquire a second TBC corresponding to the second CB of the second carrier, wherein the second TBC is configured according to a second predefined relationship between the second CB and the second TBC, wherein a third guard band and a fourth guard band are configured in the second CB that are located on opposite sides of the second TBC, respectively, and wherein the third and fourth guard bands are asymmetric with respect to a center frequency of the second CB.
 21. The method of claim 1, wherein a subcarrier set in the first TBC includes a direct current subcarrier.
 22. The wireless communications apparatus of claim 6, wherein a subcarrier set in the first TBC includes a direct current subcarrier.
 23. The method of claim 11, wherein a subcarrier set in the first TBC includes a direct current subcarrier.
 24. The wireless communications apparatus of claim 16, wherein a subcarrier set in the first TBC includes a direct current subcarrier. 